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Worksheets3.2 Generating Electricity
Total questions: 15
Worksheet time: 15mins
Efficiency is how well a device (a) one type of energy to another.
If a car converts 5000J of chemical energy into 750J of kinetic, 1250J of heat and 3000J of sound, what % efficient is it?
Calculate the % efficiency of this lightbulb.
Select the 3 fossil fuels.
Oil
Nuclear
Gas
Geothermal
Coal
Organize these options into the right categories.
Wind
Solar
Hydroelectric
Wave
Geothermal
Tidal
Biomass
Coal
Oil
Gas
Nuclear
Wind
No emissions
Unreliable
Renewable
No fuel costs
Turbines sometimes considered eyesores
Noise pollution
Nuclear
No emissions
Non-renewable
Nuclear waste
Safe
Risk of disaster
High decomissioning cost
Releases lots of energy
Select ALL the advantages of renewable energy.
Generally unreliable
Can be reused/replaced
No greenhouse gas emissions
Unsafe
Won't run out
Put the parts of a fossil fuel power station in order.
Fuel is burnt in the furnace
Water is heated into steam in the boiler
Steam turns the turbine
The turbine turns the generator to produce electricity
Steam is cooled back into water in the condenser
In the furnace of a fossil fuel power station, (a) energy is transferred to (b) energy.
Select ALL that make up the national grid.
Power stations
Cables
Pylons
Transformers
Consumers
Label this coal fired power station (not all labels are correct)
Uranium
Reactor
Condenser
Furnace
Boiler
Turbine
Generator
Step up transformers (a) voltage to (b) current. This avoids energy lost as (c) in the cables.
Select ALL that can be done if electricity demand is high.
Electricity can be imported from abroad
Electricity can be transferred from one part of the grid to another
Nuclear power stations are turned on
Hydroelectric stations are turned on
Power is cut to some areas
Why are hydroelectric stations used for reserve power generation?
No emissions
Short start up time
Cheap
